Pump for inflating pneumatic tires



(No Model.)

0. H. ALLEN. PUMP FOR INPLATING PNEUMATIC TIRES. No. 593,545.

lavgen/tyoLr. W K. W

Attorney.

is mus cov. wc-rquru UNITED STATES P TENT OFFICE.

CHARLES H. ALLEN, OF ROCHESTER, NEW YORK.

PUMP FOR INFLATING PNEUMATIC TIRES.

SPECIFICATION forming part of Letters Patent No. 593,545, datedNovember 9, 1897.

Application filed March 12, 1896.

T0 ctZZ whom it may concern.-

Be it known that 1, CHARLES H. ALLEN, of Rochester, in the county of Monroe and State of New York, have invented a certain new and useful Improvement in Pumps for Inflating Pneumatic Tires; and I do hereby declare that the following is a .full, clear, and exact description of the same, reference being had to the drawings accompanying this application.

My improvement relates to a pump attached to a wheel and so arranged that at each revolution of the wheel it is operated by contact with the ground, thereby pumping air into the tube. Such devices are already known.

The invention consists in the construction and arr. ngement of parts hereinafter described and claimed.

In the drawings, Figure 1 is an elevation of a portion of a wheel,showing my improvement applied thereto. Fig. 2 is an enlarged crosssection in line a: a: of Fig. 1, looking to the left. Fig. 3 is a sectional elevation of the pump removed from place. Fig. 4 is a sectional elevation of the upper part of the pump at right angles to Fig. 3. Fig. 5 is a plan View of the locking devices of the yoke that embraces the tire.

It is the design to make the pump an attachment to the wheel and so arranged that the plunger will be operated at each contact of the device with the ground.

A indicates the pneumatic tire, and B the ordinary supporting-rim of the Wheel.

C is the pump-cylinder, provided with a concave saddle a, that fits the rim and supports the cylinder in an upright position.

D is the plunger, provided with a col1apsi-' ble piston 6, playing in the cylinder. The top of the plunger-rod extends through a cap 0, screwed on top of the cylinder, and is attached to a cross-head d. To the ends of the cross-head are attached two arms E E, extending down around the tire, encircling the same and presenting a tread-surface that comes in contact with the ground at every revolution of the wheel. The two meeting ends of the arms are telescoped and locked together by any suitable means. As shown in the drawings, the end of one arm has a loop f, and the end of the other a hook g. The hook is inserted through the loop and engages with an independent hook h, pivoted to the Serial No. 582,911. (No model.)

opposite arm and held in contact by a spring 11. By this means the parts can be engaged and disengaged at pleasure. The cross-head and arms form a yoke which operates the piston. At every revolution of the wheel the yoke formed by the arms E E is depressed, thereby raising the piston in the cylinder. When the yoke is released again, a spring is in the cylinder throws the piston down, thereby expelling the air beneath it. The air under pressure passes through a conduit 1, having a check-valve m, and thence escapes through a pipe n, that enters the inflatable tube.

G is a head which slides freely up and down outside the cylinder G, being prevented from turning by means of lugs 0 0, which enter slots p p of the cylinder, or by other means.

H H are arms attached to this head and provided with claws r r at the lower ends, which hook under the edges of the wheel-rim 13, thus holding the pump down upon the rim. The head G and the arms H H form a stirrup which clamps the piston to the wheel-rim.

I is a nut resting under thehead G and screwing upward on the cylinder. tightens the claws and draws the pump tightly down upon the rim of the wheel.

The arms H H are provided with loops 8 8, through which the outer arms E E pass loosely, the parts being thereby connected and held in proper position. The upper ends of the arms E E and H H are provided with a series of holes 15 t, through which pass the screws that attach the arms to their holding devices, these holes serving to render the attachment adjustable to tires and rims of different sizes. The bottom of the yoke that embraces the tube may be stayed in place by an elastic band lb, attached to the tire.

The device above described is automatic in action and always keeps the tire under proper inflation without any manipulation or special care.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1'. The combination of the piston C, the saddle Cb, resting against the wheel-rim, the stirrup consisting of the head G, providedwith lugs 0 0, that enter slots in the sides of the cylinder, and arms H, H, provided with claws This nut 19 p for hooking under the edges of the wheelrim, and the nut I resting on the cylinder under the head G; the whole so arranged as to clamp the pump to the wheel-rim by reverse action of the saddle a, and the claws r, r, as herein shown and described.

2. The combination of the cylinder C, the saddle a, resting against the wheel-rim, the stirrup consisting of the head G and arms H H, provided with claws hooking under the edges of the wheel-rim, the nut I for tightening the stirrup, the rod D provided with a 1 piston 19 playing in the cylinder, the spring k for forcing the piston downward, and the yoke consisting of the cross-head cl,,and stifi arms 15 E, E extending downward and encircling the tire, the whole arranged to operate in the manner and for the purpose specified.

In witness whereof I have hereunto signed my nainein thepresenceof twosnbscribing 20 witnesses.

CHARLES H. ALLEN.

Witnesses:

R. F. Oscoon, Gno. A. GILLETTE. 

